Lava lamp



FIG. 1 is a front elevational view showing my new design;

FIG. 2 is a left elevational view, the right elevational view being amirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a plan view thereof; and,

FIG. 5 is a bottom view thereof.

The ornamental design for a lava lamp, as shown and described.